Home
Class 12
PHYSICS
A perfect gas goes from state A to anoth...

A perfect gas goes from state A to another state B by absorbing 8 x `10^5` J of heat and doing 6.5 x `10^5` J of external work. It is now transferred between the same two states in another process in which it absorbs `10^5` J of heat. Then in the second process,

A

work done by gas is `10^(5)` J

B

work done on gas is `10^(5)` J

C

work done by gas is `0.5 xx 10^(5)` J

D

work done on the gas is `0.5 xx 10^(5)` J

Text Solution

Verified by Experts

The correct Answer is:
D
`dU = dQ -dW = (8 xx 10^(5) - 6.5 xx 10^(5)) = 1.5 xx 10^(5)` J
`dW = dQ- dU = 10^(5) -1.5 xx 10^(5) = -0.5 xx 10^(5)`J
`-ve` sin indicates that work done on the gas is `0.5 xx 10^(5)` J.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS

    DISHA PUBLICATION|Exercise EXERCISE-1 : CONCEPT BUILDER (Topic-3 CARNOT ENGINE, REFIGERATOR AND SECOND LAW OF THERMODYNAMICS)|15 Videos

  • THERMAL PROPERTIES OF MATTER

    DISHA PUBLICATION|Exercise Exercise-2 (Concept Applicator)|28 Videos

  • WAVE OPTICS

    DISHA PUBLICATION|Exercise EXERCISE-2 : CONCEPT APPLICATOR|30 Videos

Similar Questions

Explore conceptually related problems

A perfect gas goes from a state A to another state B by absorbing 8 × 105 J of heat and doing 6.5 × 105 J of external work. It is now transferred between the same two states in another process in which it absorbs 105 J of heat. In the second process

A certain mass of is taken from an initial thermodynamics state A to another state B by process I and II. In process I for the gas does 5 J of work and absorbs 4 J of heat energy. In process II, the gas absorbs 5 J of heat. The work done by the gas in process II is

Knowledge Check

  • A perfect gas goes from state A to state B by absorbing 8 xx 10^5 joule and doing 6.5 xx 10^5 joule of external work. If it is taken from same initial state A to final state B in another process in which it absorbs 10^5 J of heat, then in the second process work done

    A
    On gas is `10^5J`
    B
    On gas is `0.5 xx 10^5J`
    C
    By gas is `10^5J`
    D
    By gas is `0.5 xx 10^5`J

  • A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A:

    A
    6 J of the work will be done by the gas
    B
    6 J of the work will be done by the surrounding on gas
    C
    10 J of the work will be done by the surrounding on gas
    D
    10 J of the work will be done by the gas

  • A gas expends from 1.5 to 6.5 L against a constant pressure of 0.5 atm and during this process the gas also absorbs 100 J of heat. The change in the internal energy of the gas is

    A
    `153.3 J`
    B
    `353.3 J`
    C
    `-153.3 J`
    D
    `-353.3 J`

    • Similar Questions

    Explore conceptually related problems

    When a gas is taken from one state a to another state b via one path, it absorbs 25 calories of heat while doing 70J of work. How much heat much heat has to be supplied in taking the same gas from state a to state b via another path when it performs 200J of work?

    A gas undergoes a change of state during which 100J of heat is supplied to it and it does 20J of work. The system is brough back to its original state through a process during which 20 J of heat is released by the gas. What is the work done by the gas in the second process?

    When a system goes from state A to state B, it is supplied with 400 J of heat and it does 100 J of work. (a) For this transition, what is the system's change in internal energy? (b) If the system moves from B to A, what is the change in internal energy? (c) If in moving from A to B along a different path in which W_(AB)^'=400J of work is done on the system, how much heat does it absorb?

    When a system is taken from stata a to state b along the path acb as shown in figure, 60 J of heat flows into the system and 30 J of work is done by the system. Along the path adb, if the work done by the system is 10 J, heat flow into the system is

    when a gas expands from 1. 5L to 6.5 L againt a constant pressure of 0.50 atm and during process , the gas also absorbs 100 J of heat. The change in internal energy is

    Home
    Profile